In my case, I had the vent cover mod installed and then I started ripping the case apart to find a way to up the voltage to the internal fan. The fan is rated at 5vdc, but the 5672 was only putting in 2.5vdc.
In the end, the best place to hot wire the fan is to a USB port, because there's 5vdc right there.
I didn't do that though in the end, because when I put everything back together and installed NHC, my fan now regularly gets 3.5vdc when it gets over 51degc for some reason. It seems to be something I accidentally did to the hardware more than the software. Before my fan never ran fast, but it overheated to the point that I had a HDD failure after 6 months and a burned (smoke coming out the side) motherboard by 7 months. They replaced the motherboard, CPU, and HDD.
When they returned it to me, it would get up to 91degc at the CPU and start to fail. Now it never gets over 51degc in regular running and maybe up to 59 or 60 when gaming...
It's a lot noisier, but I am so happy to hear that noise because when I do, it means my laptop isn't going to fry again.
I don't want to find to try to find out what really changed it because I am afraid the fan speed will go away.